On the Relationship between Magnetic Viscosity and Coercivity of Perpendicular Media

J.G.Th. te Lintelo, J.C. Lodder

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    Abstract

    The dependent and dc-demagnetization measurements were performed on two types of perpendicular thin film media, Co-Cr and Fe-alumite. From these the parameters for magnetic viscosity and irreversible susceptibility were derived. Their ratio, resulting in the fluctuation field, is shown to relate logarithmically to the coereivity. This so-called “Barbier plot for perpendicular media” is found to exhibit a slope of approximately one and a half instead of one, as is found for in-plane media. The activation volumes were also derived and related logarithmically to the coercivity. Here a slope of approximately minus one and a half was found, instead of minus 0.73 as is found for in-plane media.
    Original languageEnglish
    Pages (from-to)1741-1744
    Number of pages4
    JournalJournal of Applied Physics
    Volume76
    Issue number3
    DOIs
    Publication statusPublished - 1994

    Keywords

    • SMI-EXP: EXPERIMENTAL TECHNIQUES
    • SMI-TST: From 2006 in EWI-TST

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